ISP Secondary IP address

I hope someone here can help with an issue I have with my usable IP addresses

My ISP gives me the 2 ranges on my internet connection (TalkTalk EFM)

The primary IP address is on one range and includes gateway information

The secondary /28 range is on a completely different subnet and has no gateway information

I am replacing a Watchguard XTM unit and this configuration is working with this unit but I cant seem to get this to work on the RouterOS unit.

Any Idea’s?

Thanks

maybe nat rule will do the magic

Guess the first range is a /30 with one IP assigned to your WAN, and the other on your ISP side?

could you please post both ranges and gateway information? For security sake edit the first octet for example, not the last two…

i have seen a ISP on adsl without pppoe using a nat configuration on CPE asigning a static /24 ip to the CPE and a second static ip /32 configured to do NAT on some internal host

from ISP perspective the second ip (/32) is routed towards the first ip (/24)

its that your setup??